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https://issues.apache.org/jira/browse/HDFS-16767?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17603271#comment-17603271
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ASF GitHub Bot commented on HDFS-16767:
---------------------------------------
simbadzina commented on code in PR #4127:
URL: https://github.com/apache/hadoop/pull/4127#discussion_r968998635
##########
hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RBFConfigKeys.java:
##########
@@ -191,6 +191,14 @@ public class RBFConfigKeys extends
CommonConfigurationKeysPublic {
FEDERATION_STORE_PREFIX + "enable";
public static final boolean DFS_ROUTER_STORE_ENABLE_DEFAULT = true;
+ public static final String DFS_ROUTER_OBSERVER_READ_ENABLE =
+ FEDERATION_ROUTER_PREFIX + "observer.read.enable";
+ public static final boolean DFS_ROUTER_OBSERVER_READ_ENABLE_DEFAULT = false;
+
+ public static final String DFS_ROUTER_OBSERVER_AUTO_MSYNC_PERIOD =
+ FEDERATION_ROUTER_PREFIX + "observer.auto-msync-period";
+ public static final long DFS_ROUTER_OBSERVER_AUTO_MSYNC_PERIOD_DEFAULT = 0;
Review Comment:
I've now removed the auto-sync. It didn't seem to add any value.
The router's global state is constantly being updated by calls to the active
namenode.
> RBF: Support observer node from Router-Based Federation
> --------------------------------------------------------
>
> Key: HDFS-16767
> URL: https://issues.apache.org/jira/browse/HDFS-16767
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Simbarashe Dzinamarira
> Assignee: Simbarashe Dzinamarira
> Priority: Major
> Labels: pull-request-available
>
> Enable routers to direct read calls to observer namenodes.
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